I was thinking of using this wig and straightening the curls some with the tutorial (hot water). I have the wig in pink. If Oerba's hair is orange I may have to dye a blonde wig and straighten it instead.

Because Vanille's hair is in low ponytails, whichever wig you buy you will have to add extension hair for the part formed by the 2 ponytails to look natural. This can be tricky for anyone starting out, but fortunately Katie Bair has an excellent tutorial for parting for ponytails, pigtails, etc (check her website: just google search 'Petting Zoo Wigs' and its the first link, the tutorials explain everything) The only trouble I could see anyone that is styling this wig that would come into is finding loose braiding hair that would match the orange-y color of the wig. A solution to this would be custom dying a blonde wig and same colored extention hair with a pink/orange dye (I prefer the FW ink method thats explained in the 'Wigs' section of these forums) to get the right color and to make sure that the wig matches the extensions. If you aren't comfortable with making your own wig, there are a few very reputable cosplayers on this site that do commissions for very reasonable rates, if you're interested, PM them for a quote (Cora is one user that comes to mind, she does excellent work )

Yeah I know, it's just I don't want to working, styling, coloring a wig, I prefer buy a wig look like the color and form curly of theise hair, but I found only Orange colour, not Orange-pink (I don't know how we name this color).
Thank you for help me!